16 inch 350 LEGEND AR-15 Barrel, 4150 CMV and Nitrided, 1/16 Twist, Medium Contour Barrel Profile with Carbine length Gas System - made by Hitman Industries. Hitman barrels are manufactured 100% in house from the highest quality American made materials. Our manufacturing process and abilities are second to none, utilizing the most innovative design and machining techniques with the most effecient and accurate CNC equipment the world has to offer. Weight 2 Length 16 Profile Medium Twist 1:16 Finish Nitride Material 4150 CMV Thread Pitch 5/8-24 Caliber 350 LEGEND Feed Ramp Single Large Flutes N/A Gas System Carbine Rifling Conventional Gas Block System 0.750